CVE-2019-13548 : Security Advisory and Response

CODESYS V3 web server prior to version 3.5.14.10 is vulnerable to a stack-based buffer overflow, potentially leading to denial-of-service or remote code execution.

Understanding CVE-2019-13548

The vulnerability in CODESYS V3 web server allows attackers to exploit specially crafted http or https requests, causing a stack overflow.

What is CVE-2019-13548?

The vulnerability in CODESYS V3 web server, versions prior to 3.5.14.10, enables attackers to send malicious requests that can overflow the server's stack, resulting in denial-of-service or unauthorized remote code execution.

The Impact of CVE-2019-13548

Exploiting this vulnerability could lead to denial-of-service conditions or unauthorized access for remote code execution.

Technical Details of CVE-2019-13548

The technical aspects of the vulnerability in CODESYS V3 web server.

Vulnerability Description

The vulnerability allows attackers to send specially crafted http or https requests, potentially causing a stack overflow.

Affected Systems and Versions

Product: CODESYS V3 web server
Vendor: n/a
Versions Affected: All versions prior to 3.5.14.10

Exploitation Mechanism

Attackers can exploit the vulnerability by sending custom-designed http or https requests, triggering a stack overflow.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-13548.

Immediate Steps to Take

Update CODESYS V3 web server to version 3.5.14.10 or later.
Monitor network traffic for any suspicious activity.
Implement firewall rules to restrict access to the server.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Apply patches provided by the vendor promptly to address the vulnerability.